Comment by Joker_vD

Yeah, projecting onto a plane instead of a... spherical dome? means that things at the border of your screen are more visible than the things at its middle which definitely not how eyes usually work.

It's especially glaring when the far plane serves as the place where the view-distance limiting fog is rendered: if there is some thing barely visible before you, turn 45% to the side, and you'll see that thing very clearly at the side of your view.